Stator assembly with mounting lugs for oil feeding and oil-cooled motor comprising stator assembly

Abstract

The invention discloses a stator assembly with mounting lugs for feeding oil and an oil-cooled motor comprising the stator assembly. The stator assembly comprises a stator core and a stator winding nested on the stator core; a plurality of mounting lugs are arranged on the outer circumference of the stator core, and at least one mounting lug is provided with a first oil inlet hole; the stator core comprises an oil inlet lamination section, circulation lamination sections and a drainage spraying lamination section, the oil inlet lamination section is located in the middle of the stator core, the drainage spraying lamination section is located at the end of the stator core, and the circulation lamination sections are located on the two sides of the oil inlet lamination section; the oil inlet lamination section comprises a first oil duct, the circulation lamination section comprises a second oil duct, the drainage spraying lamination section comprises a third oil duct and an oil spraying hole, the first oil duct, the second oil duct, the third oil duct and the oil spraying hole are communicated in sequence, oil flows into the first oil duct through the first oil inlet hole, then is dispersed to the second oil duct, and is finally drained and guided by the third oil duct; and the oil is sprayed to the stator winding through the oil spraying holes. The stator assembly has the characteristics of compact structure, convenience in disassembly and assembly, high cooling efficiency and the like, and the cooling capacity of the stator assembly is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-cooled motors, and in particular to a stator assembly with an oil inlet mounting lug and an oil-cooled motor comprising the same. Background Art

[0002] With the development of miniaturization and high power density of new energy vehicle motors, direct oil cooling can directly remove the heat inside the motor and significantly improve the power density of the motor compared to the traditional casing water cooling structure, and is gradually being widely used.

[0003] In existing oil-cooled motors, a portion of the motor stator is fixed to the housing via mounting ears. The stator of this mounting structure usually has an oil pipe extending from the outside of the stator, with an oil spray hole opened on the oil pipe. After the oil enters the oil pipe, it is sprayed from the oil spray hole onto the surface of the stator core and the end of the winding, cooling the stator core and winding.

[0004] The problems with the above solution are: 1) the number of circumferential oil pipes is limited, and the oil cannot cover the stator well in the circumferential direction, which easily leads to areas of poor local cooling and poor cooling effect; 2) the oil injection pipe is installed outside the radial direction of the stator core, occupying radial space. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the deficiencies of the prior art and provide a stator assembly with an oil-inlet mounting lug and an oil-cooled motor comprising the same, which has a compact structure, is easy to assemble and disassemble, and has a significant cooling effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: A stator assembly with mounting ears for oil inlet, comprising a stator core and a stator winding nested on the stator core; the inner circumference of the stator core is provided with a winding mounting groove, the winding mounting groove is used to nest the stator winding; a plurality of mounting ears are provided on the outer circumference of the stator core, the mounting ears are used to mount and fix the stator assembly to the motor housing; and at least one mounting ear is provided with a first oil inlet hole; the stator core comprises an oil inlet stack, a flow stack and a drainage spray stack, the oil inlet stack is located in the middle of the stator core, the drainage spray stack is provided The stack is located at the end of the stator core, and the circulation stack is arranged between the oil inlet stack and the drainage spray stack; the oil inlet stack includes a first oil channel, the circulation stack includes a second oil channel, and the drainage spray stack includes a third oil channel and an oil spray hole. The first oil channel, the second oil channel, the third oil channel and the oil spray hole are connected in sequence. The oil flows into the first oil channel of the oil inlet stack through the first oil inlet hole on the mounting ear, and then disperses to the second oil channel of the circulation stack. Finally, it is guided by the third oil channel of the drainage spray stack and sprayed onto the stator winding through the oil spray hole. As a further improvement of the present invention, the drainage spray stack includes a first drainage spray stack and a second drainage spray stack, the second drainage spray stack is located at the end of the stator core, and the first drainage spray stack is located between the flow stack and the second drainage spray stack; the first drainage spray stack includes a third oil channel, and the second drainage spray stack includes an oil spray hole, and the oil spray hole is connected to the third oil channel. As a further improvement of the present invention, the third oil passage is T-shaped, rectangular, conical or triangular, and is connected to the second oil passage in the circumferential direction and to the oil injection hole in the radial direction.

[0007] As a further improvement of the present invention, the oil inlet stack is formed by stacking several sections of oil inlet punches, a winding mounting groove is provided on the inner circumference of the oil inlet punch, a plurality of mounting ears are symmetrically provided on the outer circumference of the oil inlet punch, bolt holes are provided on the mounting ears, and at least one mounting ear is provided with a second oil inlet hole, and a plurality of first oil channels are provided on the oil inlet punch, wherein two first oil channels are respectively connected to two second oil inlet holes. As a further improvement of the present invention, the number of first oil channels on the oil inlet punch is an odd number, and two adjacent sections of the oil inlet punch are rotated and stacked to achieve complete overlap of the second oil inlet holes, mounting ears, bolt holes and winding mounting grooves of the two sections of the oil inlet punch, and the first oil channel of the upper section of the oil inlet punch spans the two first oil channels of the lower section of the oil inlet punch. As a further improvement of the present invention, the circulation stack is formed by alternatingly rotating and stacking several sections of circulation punches, a winding mounting groove is provided on the inner circumference of the circulation punch, a plurality of mounting ears are symmetrically provided on the outer circumference of the circulation punch, bolt holes are provided on the mounting ears, and at least one mounting ear is provided with a first oil inlet hole, a plurality of second oil channels are provided on the circulation punch, and there is an overlapping area in the second oil channels of two adjacent sections of circulation punches. As a further improvement of the present invention, the first drainage spray stack is formed by stacking several sections of first drainage spray punches, a winding mounting groove is provided on the inner circumference of the first drainage spray punch, and a plurality of mounting ears are symmetrically provided on the outer circumference of the first drainage spray punch, the mounting ears are provided with bolt holes, and at least one mounting ear is provided with a first oil inlet hole, and the first drainage spray punch is provided with several third oil channels, the third oil channels are T-shaped, rectangular, conical or triangular, the third oil channels are connected with the second oil channels in the circumferential direction, and the third oil channels are connected with the oil spray holes in the radial direction. As a further improvement of the present invention, the second drainage spray stack is formed by stacking several sections of second drainage spray punches, a winding mounting groove is provided on the inner circumference of the second drainage spray punch, and a plurality of mounting ears are symmetrically provided on the outer circumference of the second drainage spray punch, the mounting ears are provided with bolt holes, and at least one mounting ear is provided with a first oil inlet hole, and the second drainage spray punch is provided with a plurality of oil spray holes. As a further improvement of the present invention, the oil injection hole is a rectangular hole, a circular hole, a trapezoidal hole or a waist-shaped hole. As a further improvement of the present invention, the first drainage spray stack section is formed by stacking several sections of first drainage spray punches, a winding mounting groove is provided on the inner circumference of the first drainage spray punch, and a plurality of mounting ears are symmetrically provided on the outer circumference of the first drainage spray punch, the mounting ears are provided with bolt holes, and at least one mounting ear is provided with a first oil inlet hole, the first drainage spray punch is alternately provided with several third oil channels and several oil spray holes, the third oil channels are T-shaped, rectangular, conical or triangular, and two adjacent sections of the first drainage spray punches are rotated and stacked to achieve overlap between the oil spray holes and the third oil channels, thereby forming a drainage spray channel. As a general technical concept, the present invention also provides an oil-cooled motor, including the above-mentioned stator assembly with mounting ears for oil inlet.

[0008] Compared with the prior art, the advantages of the present invention are: The stator assembly with an installed ear for oil inlet and the oil-cooled motor including the same of the present invention are composed of the main structure of the stator core through the oil inlet stack, the flow stack and the drainage spray stack. The oil inlet stack is located in the middle of the stator core, the drainage spray stack is located at the end of the stator core, the flow stack is located between the oil inlet stack and the drainage spray stack, the oil inlet stack is provided with a first oil channel, the flow stack is provided with a second oil channel, the drainage spray stack is provided with a third oil channel and an oil spray hole, and the first oil channel, the second oil channel, the third oil channel and the oil spray hole are connected in sequence. A first oil inlet hole is provided on the mounting ear, which not only meets the installation and fixing requirements of the stator assembly, but also enables the cooling oil to flow into the first oil channel through the first oil inlet hole, then disperse to the second oil channel on both sides, and finally be guided by the third oil channel and sprayed onto the stator winding through the oil spray hole. The stator assembly of the present invention eliminates the oil spray pipe, and the oil enters the iron core from the mounting ear and flows in the iron core oil channel to cool the iron core. By providing a drainage structure at the end of the iron core, the oil is sprayed onto the end of the winding to cool the winding, which significantly improves the cooling efficiency of the stator assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structural principle of a stator assembly with an oil inlet installed in a specific embodiment 1 of the present invention; Figure 2 Schematic diagram of the oil flow path in specific embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structural principle of the oil inlet punch in the specific embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the structural principle of the circulation punch in the specific embodiment 1 of the present invention; Figure 5This is a schematic diagram of the structural principle of the first drainage spray punch in the specific embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the structural principle of the second drainage spray punch in the specific embodiment 1 of the present invention; Figure 7 Schematic diagram of the structural principle of the oil inlet stack in specific embodiment 1 of the present invention; Figure 8 This is a schematic structural diagram of a portion of the oil inlet punches in the oil inlet stack after being dispersed in the specific embodiment 1 of the present invention; Figure 9 Schematic diagram of the oil passage positions of two adjacent oil inlet punches in specific embodiment 1 of the present invention; Figure 10 Schematic diagram of the structure of the circumferential oil flow channel formed by the oil inlet stack in the specific embodiment 1 of the present invention; Figure 11 Schematic diagram of the oil channel structure formed by the circulation stack in the specific embodiment 1 of the present invention; Figure 12 Schematic diagram of the oil channel structure of the drainage spray stack in specific embodiment 1 of the present invention; Figure 13 Schematic diagram of the oil flow channel structure in the stator core in the specific embodiment 1 of the present invention; Figure 14 This is a schematic diagram of the direction inside the stator core in specific embodiment 1 of the present invention; Figure 15 This is a schematic diagram of the structural principle of the oil inlet punch in the specific embodiment 2 of the present invention; Figure 16 Schematic diagram of the oil flow channel structure in the stator core in specific embodiment 2 of the present invention; Figure 17 This is a schematic diagram of the structural principle of the circulation punch in the specific embodiment 3 of the present invention; Figure 18 Schematic diagram of the structural principle of the stator core in specific embodiment 3 of the present invention; Figure 19 Schematic diagram of the oil flow channel structure in the stator core in specific embodiment 3 of the present invention; Figure 20 This is a schematic diagram of the structural principle of the first drainage spray punch in specific embodiment 4 of the present invention; Figure 21 Schematic diagram of the structural principle of the stator core in specific embodiment 4 of the present invention; Figure 22 Schematic diagram of the oil flow channel of the drainage spray section in specific embodiment 4 of the present invention; Figure 23 Schematic diagram of the oil flow channel structure in the stator core in specific embodiment 4 of the present invention; Figure 24 This is a schematic diagram of the structural principle of the oil inlet punch in a specific embodiment of the present invention; Legend: 1. Stator core; 2. Stator winding; 11. Oil inlet punching plate; 12. Circulation punching plate; 13. First drainage spray punching plate; 14. Second drainage spray punching plate; 110. Oil inlet stack; 120. Circulation stack; 130. First drainage spray stack; 140. Second drainage spray stack; 101. Mounting ear; 102. Bolt hole; 103. Winding mounting slot; 104. First oil inlet hole; 111. Second oil inlet hole; 112. First oil channel; 122. Second oil channel; 132. Third oil channel; 142. Oil spray hole. DETAILED DESCRIPTION

[0010] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0011] In the description of the present invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0012] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0013] Example 1 like Figures 1 to 14As shown, the stator assembly with mounting lugs for oil inlet of the present invention comprises a stator core 1 and a stator winding 2 nested within the stator core 1. The inner circumference of the stator core 1 is provided with a winding mounting slot 103 for nesting the stator winding 2. Four mounting lugs 101 are symmetrically provided on the outer circumference of the stator core 1. These lugs 101 are used to secure the stator assembly to the motor housing; two of these lugs 101 are provided with a first oil inlet hole 104. The stator core 1 includes an oil inlet stack 110, a flow stack 120, a first drainage spray stack 130, and a second drainage spray stack 140. The oil inlet stack 110 is located in the middle of the stator core 1, the second drainage spray stack 140 is located at the end of the stator core 1, that is, the end of the second drainage spray stack 140 close to the stator winding 2, and the flow stack 120 is arranged between the oil inlet stack 110 and the first drainage spray stack 130. Furthermore, the oil inlet stack 110 includes a first oil passage 112, the flow stack 120 includes a second oil passage 122, the first drainage spray stack 130 includes a third oil passage 132, and the second drainage spray stack 140 includes an oil spray hole 142. The first oil passage 112, the second oil passage 122, the third oil passage 132, and the oil spray hole 142 are sequentially connected to form an oil flow channel within the stator core 1.

[0014] Furthermore, the third oil passage 132 has a T-shaped structure. The third oil passage 132 is connected to the second oil passage 122 in the circumferential direction, and the third oil passage 132 is connected to the oil injection hole 142 in the radial direction.

[0015] In this embodiment, the length of each lamination stack of the stator core 1 can be varied, as can the total number of stacked segments. Welding seams or positioning grooves are added to the laminations to facilitate gluing or welding the lamination stacks. To prevent oil from entering through the first oil hole 104 at one end of the lamination and then leaking out through the first oil hole 104 at the other end, a bowl-shaped plug can be used to seal the first oil hole 104 at the other end of the lamination.

[0016] like Figure 2 As shown in FIG, the oil flows into the first oil channel 112 of the oil inlet stack 110 through the first oil inlet hole 104 on the mounting ear 101, and is then dispersed to the second oil channel 122 of the flow stack 120. Finally, it is guided by the third oil channel 132 of the first diversion spray stack 130 and sprayed onto the stator winding 2 through the oil spray hole 142 of the second diversion spray stack 140.

[0017] In this embodiment, the main structure of the stator core 1 is composed of an oil inlet stack 110, a flow stack 120 and a first drainage spray stack 130. The oil inlet stack 110 is located in the middle of the stator core 1, the first drainage spray stack 130 is located at the end of the stator core 1, and the flow stack 120 is located between the oil inlet stack 110 and the first drainage spray stack 130. The oil inlet stack 110 is provided with a first oil channel 112, the flow stack 120 is provided with a second oil channel 122, and the first drainage spray stack 130 is provided with a third oil channel 132. The first oil channel 112, the second oil channel 122 and the third oil channel 132 are arranged in a predetermined order. The stator core 1 is connected to the stator 2 by providing a first oil inlet hole 104 on the mounting ear 101 of the stator core 1, which not only meets the installation and fixing requirements of the stator assembly, but also enables the cooling oil to flow into the first oil channel 112 through the first oil inlet hole 104, and then disperse to both sides to the second oil channel 122, and finally sprayed onto the stator winding 2 through the third oil channel 132. The stator assembly of the present invention eliminates the oil spray pipe. The oil enters the core from the mounting ear and flows in the oil channel of the core to cool the core. By providing a drainage structure at the end of the core, the oil is sprayed onto the end of the winding to cool the winding, which significantly improves the cooling efficiency of the stator assembly.

[0018] like Figure 3 and Figure 7 As shown, the oil inlet stack 110 is formed by stacking several oil inlet punches 11. A winding mounting groove 103 is provided on the inner circumference of the oil inlet punch 11. Four mounting ears 101 are symmetrically arranged on the outer circumference of the oil inlet punch 11. Each mounting ear 101 has a bolt hole 102. Two opposing mounting ears 101 are provided with second oil inlet holes 111, i.e., the two second oil inlet holes 111 are spaced 180° apart in the circumferential direction. The oil inlet punch 11 is provided with several arc-shaped first oil passages 112, two of which are connected to the two second oil inlet holes 111, respectively, to enable oil to flow from the second oil inlet holes 111 to the first oil passages 112.

[0019] like Figure 3 、 Figure 8 、 Figure 9 and Figure 10 As shown, the number of first oil passages 112 on the oil inlet punch 11 is an odd number, and two adjacent oil inlet punches 11 are rotated 180° and stacked to achieve complete overlap of the second oil inlet holes 111, mounting ears 101, bolt holes 102 and winding mounting slots 103 of the two oil inlet punches 11, and the first oil passages 112 of the upper oil inlet punch 11 span the two first oil passages 112 of the lower oil inlet punch 11 to form a connected oil flow channel. Figure 8 、 Figure 9 and Figure 10As shown, by rotating the multiple oil inlet punches 11 by 180° and stacking them, all the first oil passages 112 in the circumferential direction are connected, and the oil entering from the second oil inlet hole 111 can also be distributed to each of the first oil passages 112 in the circumferential direction.

[0020] like Figure 4 and Figure 11 As shown, the circulation stack 120 is formed by a plurality of circulation punches 12 alternately rotated 180° and stacked. A winding mounting groove 103 is provided on the inner circumference of the circulation punch 12, and four mounting ears 101 are symmetrically provided on the outer circumference of the circulation punch 12. The mounting ears 101 are provided with bolt holes 102, and the first oil inlet holes 104 are provided on the two opposite mounting ears 101, that is, the two first oil inlet holes 104 are spaced 180° apart in the circumferential direction. The circulation punch 12 is provided with a plurality of arc-shaped second oil passages 122, and the second oil passages 122 of two adjacent circulation punches 12 have overlapping areas. Figure 11 As shown, in the flow stack 120 , the oil flows in both the axial and circumferential directions. The second oil passage 122 overlaps with the first oil passage 112 to enable the oil to flow from the first oil passage 112 to the second oil passage 122 .

[0021] like Figure 5 As shown, the first drainage spray stack 130 is formed by stacking several first drainage spray fins 13. Winding mounting slots 103 are provided on the inner circumference of each of the first drainage spray fins 13. Four mounting ears 101 are symmetrically arranged on the outer circumference of each of the first drainage spray fins 13. Each mounting ear 101 is provided with a bolt hole 102, and two opposing mounting ears 101 are provided with a first oil inlet hole 104. That is, the two first oil inlet holes 104 are spaced 180° apart in the circumferential direction. The first drainage spray fins 13 are provided with several third oil passages 132. These third oil passages 132 are T-shaped and circumferentially connect to the second oil passages 122. They also radially connect to the oil spray holes 142.

[0022] like Figure 6 As shown, the second drainage spray stack 140 is formed by stacking several sections of second drainage spray fins 14. A winding mounting groove 103 is provided on the inner circumference of each second drainage spray fin 14. A plurality of mounting ears 101 are symmetrically provided on the outer circumference of each second drainage spray fin 14. Each mounting ear 101 is provided with a bolt hole 102. Two opposing mounting ears 101 are provided with a first oil inlet hole 104. That is, the two first oil inlet holes 104 are spaced 180 degrees apart in the circumferential direction. The second drainage spray fin 14 is provided with a plurality of oil spray holes 142.

[0023] The oil flows axially from the second oil passage 122 to the third oil passage 132, flows radially along the T-shaped oil passage of the third oil passage 132, and then flows axially through the oil injection hole 142. Since the oil has radial velocity in the third oil passage 132 and axial velocity in the adjacent oil injection hole 142, and since the radial length of the third oil passage 132 and the axial length of the oil injection hole 142 are both relatively short, the oil is not fully developed in both the axial and radial directions. Therefore, after flowing through the third oil passage 132 and the oil injection hole 142, the oil is combined into an oblique velocity and finally sprayed onto the end of the stator winding 2, as shown in FIG. Figure 12 shown.

[0024] like Figure 6 As shown, in this embodiment, the oil injection holes 142 adopt a rectangular hole structure and are evenly arranged along the circumference on the second drainage spray punch 14. In other embodiments, the oil injection holes 142 may also adopt a circular hole, a trapezoidal hole, or a waist-shaped hole structure. The oil injection holes 142 may also be unevenly distributed along the circumference, and the third oil passages 132 may also be evenly or unevenly distributed along the circumference accordingly. The oil injection holes 142 can be set at different radial positions in the circumference, and the corresponding third oil passages 132 on the first drainage spray punch 13 are also at different radial positions, that is, the setting positions of the third oil passages 132 and the oil injection holes 142 match each other.

[0025] like Figure 24 As shown in , in other embodiments, the first oil inlet hole 104 and the mounting ear 101 can also be separately provided on the stator punching sheet, which can also achieve the purpose of eliminating the oil injection pipe, and can also ensure efficient use of oil and improve the cooling capacity of the core.

[0026] In this embodiment, the heat dissipation of the stator core 1 is achieved in the following way: the cooling oil is input into the stator core 1 through the first oil inlet hole 104 on the mounting ear 101, flows to the oil inlet stack 110 in the middle of the stator core 1, passes through the second oil inlet port 111 on the oil inlet punch 11, and radially flows into the circumferentially connected first oil channel 112 formed by the rotational stacking of the oil inlet punch 11, so that the oil is distributed to the circumferential oil channel, and then flows through the second oil channel 122 circumferential to the flow stack 120, and then flows through the third oil channel 132 and the oil spray hole 142 of the drainage spray section formed by the first drainage spray stack 130 and the second drainage spray stack 140, guiding the oil to perform velocity vector synthesis in the drainage spray section to form an inclined spray velocity, and spraying it to the end of the stator winding 2, thereby achieving cooling of the stator core 1 and the stator winding 2. The cooling oil circuit is as follows Figure 2 As shown by the arrow path in the middle, the oil flow channel is as follows Figure 13 shown.

[0027] This embodiment also provides an oil-cooled motor in which the aforementioned stator assembly with mounting lugs for oil inlet is installed. This eliminates the need for conventional oil injection pipes, saving radial space in the motor and reducing the cost of the oil injection assembly. Furthermore, oil circumferentially circumferentially cools the stator core, improving the uniformity of oil cooling along the stator's circumference.

[0028] Example 2 like Figure 15 and Figure 16 As shown, the stator assembly with mounting ears for oil inlet of the present invention has a similar structural arrangement and working principle to the stator assembly in Example 1, the main difference being that only one second oil inlet hole 111 is provided on the oil inlet punch 11, and there is no need to stagger and overlap two adjacent sections of the oil inlet punch 11, nor is there a need to provide an additional blocking component.

[0029] The cooling oil is input into the stator core 1 through the first oil inlet hole 104 on the mounting ear 101, flows into the oil inlet stack 110 in the middle of the stator core 1, passes through the second oil inlet port 111 on the oil inlet punch 11, and flows radially into the circumferentially connected first oil channel 112 formed by the stack of oil inlet punches 11, so that the oil is distributed to the circumferential oil channel, and then flows through the second oil channel 122 circumferentially of the flow stack 120, and then flows through the third oil channel 132 and the oil spray hole 142 of the drainage spray section formed by the first drainage spray stack 130 and the second drainage spray stack 140, guiding the oil to perform velocity vector synthesis in the drainage spray section to form an inclined spray velocity, and spraying it to the end of the stator winding 2, thereby cooling the stator core 1 and the stator winding 2. The cooling oil circuit is as follows Figure 2 As shown by the arrow path in the middle, the oil flow channel is as follows Figure 16 shown.

[0030] Example 3 like Figure 17 、 Figure 18 and Figure 19 As shown, the stator assembly with lugs for oil inlet of the present invention has a similar structural arrangement and working principle to the stator assembly in Example 1, with the main difference being that only one first oil inlet hole 104 is provided on the flow punch 12, and no additional blocking component is required. At the same time, the flow stacks 120 on both sides of the oil inlet stack 110 are staggered 180°, as shown in FIG. Figure 18 At this time, the oil flow channel in the stator core 1 is as shown. Figure 19 As shown, after the oil enters the first oil hole 104 on one side of the stator core 1, it cannot flow to the other side of the stator core 1, achieving the effect of self-blocking the oil channel through the core punching sheet.

[0031] Example 4 like Figures 20 to 23As shown, the stator assembly with mounting ears for oil supply of the present invention has similar structural settings and working principles to the stator assembly in Example 1, and the main difference is that: the first drainage spray stack 130 is formed by stacking several sections of first drainage spray punches 13, and the first drainage spray punches 13 are provided with winding mounting grooves 103 on the inner circumference, and the first drainage spray punches 13 are symmetrically provided with multiple mounting ears 101 on the outer circumference, and the mounting ears 101 are provided with bolt holes 102, and the two relatively arranged mounting ears 101 are provided with first oil inlet holes 104, that is, the two first oil inlet holes 104 are spaced 180° apart in the circumferential direction. A plurality of third oil channels 132 and a plurality of oil spray holes 142 are alternately provided on the first drainage spray punches 13, and the third oil channels 132 are T-shaped. As shown Figure 21 and Figure 22 As shown, two adjacent sections of the first drainage spray punching plates 13 are rotated 180 degrees and stacked to achieve overlap between the oil spray hole 142 and the third oil channel 132, thereby forming a drainage spray channel.

[0032] In this embodiment, the oil flow channel inside the stator core 1 is as follows: Figure 23 As shown, the cooling oil is input into the stator core 1 through a first oil inlet hole 104 on the mounting ear 101, flows into the oil inlet stack 110 in the middle of the stator core 1, passes through the second oil inlet port 111 on the oil inlet punch 11, and radially flows to the circumferentially connected first oil channel 112 formed by the rotation and stacking of the oil inlet punches 11, so that the oil is distributed to the circumferential oil channel, and then flows through the second oil channel 122 circumferentially of the flow stack 120, and then flows through the third oil channel 132 and the oil spray hole 142 of the drainage spray section formed by the first drainage spray punch 13 rotated 180° and stacked, guiding the oil to perform velocity vector synthesis in this part to form an inclined spray velocity, and spraying it to the end of the stator winding 2, thereby realizing cooling of the stator core 1 and the stator winding 2. At the same time, the mounting ear 101 of the flow punching plate 12 has only one first oil hole 104. The flow stacks 120 on either side of the oil inlet stack 110 are staggered 180 degrees, so that the first oil hole 104 is blocked at the other end of the punching plate stack. By utilizing the three-punch structure, the oil enters the stator core 1 from the mounting ear 101, flows through the inner circumference of the stator core 1, and is then sprayed obliquely from both ends of the stator core 1 onto the stator winding 2.

[0033] In this embodiment, the cooling requirements of the stator core 1 and the stator winding 2 are fully taken into consideration. By setting a first oil inlet hole 104 on the mounting ear 101 of the stator core 1, and through the reasonable oil channel design and rotational stacking of different core punchings, a connected oil circulation channel is formed, so that oil can be fed from the mounting ear, and the oil is distributed circumferentially inside the stator core 1, and finally sprayed out from both ends of the stator core 1 to cool the stator winding 2.

[0034] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A stator assembly with an oil-inlet mounting lug, characterized in that: The invention comprises a stator core (1) and a stator winding (2) nested on the stator core (1); the inner circumference of the stator core (1) is provided with a winding installation groove (103), and the winding installation groove (103) is used to nest the stator winding (2); the outer circumference of the stator core (1) is provided with a plurality of installation ears (101), and the installation ears (101) are used to install and fix the stator assembly to the motor housing; and at least one installation ear (101) is provided with a first oil inlet hole (104); the stator core (1) comprises an oil inlet stack (110), a flow stack (120) and a drainage spray stack, wherein the oil inlet stack (110) is located in the middle of the stator core (1), the drainage spray stack is located at the end of the stator core (1), and the flow stack (120) is located at the end of the stator core (1). ) is arranged between the oil inlet stack (110) and the drainage spray stack; the oil inlet stack (110) includes a first oil channel (112), the circulation stack (120) includes a second oil channel (122), and the drainage spray stack includes a third oil channel (132) and an oil spray hole (142); the first oil channel (112), the second oil channel (122), the third oil channel (132) and the oil spray hole (142) are connected in sequence, and the oil flows into the first oil channel (112) of the oil inlet stack (110) through the first oil inlet hole (104) on the mounting ear (101), and then dispersed to the second oil channel (122) of the circulation stack (120), and finally guided by the third oil channel (132) of the drainage spray stack, and sprayed onto the stator winding (2) through the oil spray hole (142).

2. The stator assembly with mounting lugs for oil inlet according to claim 1, characterized in that: The drainage spray stack includes a first drainage spray stack (130) and a second drainage spray stack (140), wherein the second drainage spray stack (140) is located at the end of the stator core (1), and the first drainage spray stack (130) is located between the flow stack (120) and the second drainage spray stack (140); the first drainage spray stack (130) includes a third oil passage (132), and the second drainage spray stack (140) includes an oil spray hole (142), and the oil spray hole (142) is connected to the third oil passage (132).

3. The stator assembly with mounting lugs for oil inlet according to claim 2, characterized in that: The third oil passage (132) is T-shaped, rectangular, conical or triangular. The third oil passage (132) is connected to the second oil passage (122) in the circumferential direction and is connected to the oil injection hole (142) in the radial direction.

4. The stator assembly with mounting lugs for oil inlet according to claim 3, characterized in that: The oil inlet stack (110) is formed by stacking a plurality of oil inlet punching sheets (11), wherein a winding mounting groove (103) is provided on the inner circumference of the oil inlet punching sheet (11), a plurality of mounting ears (101) are symmetrically provided on the outer circumference of the oil inlet punching sheet (11), a bolt hole (102) is provided on the mounting ears (101), and at least one mounting ear (101) is provided with a second oil inlet hole (111), and a plurality of first oil passages (112) are provided on the oil inlet punching sheet (11), wherein two first oil passages (112) are respectively connected to the two second oil inlet holes (111).

5. The stator assembly with mounting lugs for oil inlet according to claim 4, characterized in that: The number of the first oil passages (112) on the oil inlet punch (11) is an odd number, and two adjacent sections of the oil inlet punch (11) are rotated and stacked so that the second oil inlet holes (111), the mounting ears (101), the bolt holes (102) and the winding mounting grooves (103) of the two sections of the oil inlet punch (11) completely overlap, and the first oil passage (112) of the upper section of the oil inlet punch (11) spans over the two first oil passages (112) of the lower section of the oil inlet punch (11).

6. The stator assembly with mounting lugs for oil inlet according to claim 3, characterized in that: The circulation stack (120) is formed by alternately rotating and stacking a plurality of circulation punches (12); a winding mounting groove (103) is provided on the inner circumference of the circulation punch (12); a plurality of mounting ears (101) are symmetrically provided on the outer circumference of the circulation punch (12); a bolt hole (102) is provided on the mounting ear (101); and at least one mounting ear (101) is provided with a first oil inlet hole (104); a plurality of second oil passages (122) are provided on the circulation punch (12); and the second oil passages (122) of two adjacent circulation punches (12) have overlapping areas.

7. The stator assembly with mounting lugs for oil inlet according to claim 3, characterized in that: The first drainage spray stack (130) is formed by stacking a plurality of first drainage spray fins (13), wherein a winding mounting groove (103) is provided on the inner circumference of the first drainage spray fins (13), a plurality of mounting ears (101) are symmetrically provided on the outer circumference of the first drainage spray fins (13), the mounting ears (101) are provided with bolt holes (102), and at least one mounting ear (101) is provided with a first oil inlet hole (104), and the first drainage spray fins (13) are provided with a plurality of third oil passages (132).

8. The stator assembly with mounting lugs for oil inlet according to claim 7, characterized in that: The second drainage spray stack (140) is formed by stacking a plurality of second drainage spray fins (14), wherein a winding mounting groove (103) is provided on the inner circumference of the second drainage spray fins (14), and a plurality of mounting ears (101) are symmetrically provided on the outer circumference of the second drainage spray fins (14), wherein the mounting ears (101) are provided with bolt holes (102), and at least one mounting ear (101) is provided with a first oil inlet hole (104), and the second drainage spray fins (14) are provided with a plurality of oil spray holes (142).

9. The stator assembly with mounting lugs for oil inlet according to claim 1, characterized in that: The drainage spray stack section includes a first drainage spray stack section (130), the first drainage spray stack section (130) is formed by stacking a plurality of first drainage spray punching sheets (13), a winding mounting groove (103) is provided on the inner circumference of the first drainage spray punching sheet (13), a plurality of mounting ears (101) are symmetrically provided on the outer circumference of the first drainage spray punching sheet (13), the mounting ears (101) are provided with bolt holes (102), and at least one mounting ear (101) is provided with a first oil inlet hole (104), the first drainage spray punching sheet (13) is alternately provided with a plurality of third oil passages (132) and a plurality of oil spray holes (142), the third oil passages (132) are T-shaped, rectangular, conical or triangular, and two adjacent first drainage spray punching sheets (13) are rotated and stacked to achieve overlap of the oil spray holes (142) and the third oil passages (132), thereby forming a drainage spray channel.

10. An oil-cooled motor, characterized in that: A stator assembly with an oil-inlet mounting lug comprising the stator assembly according to any one of claims 1 to 9.

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